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SR 520 Bridge Replacement and HOV Program


We're closing SR 520 the weekend of Aug. 25-28 to prepare for the West Approach Bridge North's opening to traffic. Read more about it.

For the most up-to-date information about SR 520 construction activities and planned closures, check our SR 520 Orange Page .

Current News

New SR 520 westbound lanes opening next week

Important! Westbound: Straight AheadWe’re about to open the new West Approach Bridge North’s three westbound lanes on SR 520. So come Monday, Aug. 28, following a weekend closure of the highway, westbound motorists will drive straight ahead while crossing Lake Washington rather than curving left from the new floating bridge onto the old west approach structure. Watch this video to see how the new approach bridge changes cross-lake travel. 

SR 520's shared-use path to cross lake, reach Seattle this fall

You don't have to wait much longer. The new bicycle and pedestrian path along SR 520 is scheduled to extend from the floating bridge to Montlake this fall -- probably November. It's going to be a great ride ... or run ... or walk! 

Meet our new SR 520 ombudsman
We have a new ombudsman for the SR 520 Program. His job is to look into community concerns or suggestions about our construction work and its effects on neighborhoods in the corridor. Watch this video to hear our ombudsman, David Goldberg, discuss his new role.

Program Overview

The SR 520 Bridge Replacement and HOV Program is enhancing public safety and mobility by replacing the highway's aging, vulnerable bridges and making significant transit and roadway improvements throughout the corridor. The construction program's planned improvements extend from I-5 in Seattle to I-405 in Bellevue.

Click a project title for more information

Project photos on Flickr

View the latest SR 520 project photos on Flickr .

Construction cameras

View archived photos taken 'round the clock by mounted construction cameras .

Contact Information:  



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Phone: 206-770-3500

More information on Program Contact Us


West Approach Bridge North ProjectI-5 to Lake WashingtonFloating Bridge and Landings ProjectEastside Transit and HOV ProjectPontoon Construction Project